<!DOCTYPE html>
<html lang="en"
      xmlns:sec="https://www.thymeleaf.org/thymeleaf-extras-springsecurity5"
      xmlns:th="http://www.thymeleaf.org"
      xmlns="http://www.w3.org/1999/html">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="/login" method="post">
        <input type="hidden" name="_csrf" th:value="${_csrf.token}" th:if="${_csrf}">
        用户名:<input type="text" name="userName"/><br/>
        密  码:<input type="password" name="passWord"/><br/>
        <input type="submit" value="登录">
    </form>
</body>
</html>